Example in 17.3 is contradictory

[malaire]

Example in chapter 17.3 is contradictory in whether text should be allowed to be added only in Draft state or in any state.

After listing 17-11 text says:

... we want to allow text to be added to the blog post while it’s in the draft state ...

Later after listing 17-13 text says:

... This behavior doesn’t depend on the state the post is in, so it’s not part of the state pattern. The add_text method doesn’t interact with the state field at all, but it is part of the behavior we want to support.

[videbar]

I didn't find this particularly contradictory, I understood:

We want to allow the user to create a new draft blog post with Post::new. Then we want to allow text to be added to the blog post while it’s in the draft state.

as "Post::new will create a new post with the state set as Draft which we we can edit", without making any implications about whether or not should be editable in the other states, but I guess there's no harm in making it clearer.